sup chillum. u should at least try subbing it. i actually just got back an hour or so ago from my local hospital. i had the physical with a UA. i used the ultra klean synth urine to sub it out for mine. so to make sure i could hide it for the physical if need be, i bought 3 pairs of tight boxer briefs.i wore the unaltered one on skin, cut up the 2nd for parts and used it to sew a pocket into the crotch of the 3rd where i could access it even if some1 was in the room but still keep it warm(bad idea tho, it made bubble sounds wen air was sucked in) but luckily the lady jst made me empty pockets and dyed the toilet. i also diluted just in case someone was watching, but i failed the hometest yesterday. i stuck bottle in my pocket after i was done n left. had the physical right after, easy. n should b gettin a nice call monday. u gotta at least give it a shot, i was freaking out wicked, but i was optimistic after i saw that boxer idea on another forum. good luck man, hope this helps ya n